[INFO] fetching crate cozal 0.0.2...
[INFO] documenting cozal-0.0.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate cozal 0.0.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate cozal 0.0.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cozal 0.0.2
[INFO] finished tweaking crates.io crate cozal 0.0.2
[INFO] tweaked toml for crates.io crate cozal 0.0.2 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b32f07161bef0c70f92321782bbf9cf80fa042635d67a11d45289b5d7333bc08
[INFO] running `Command { std: "docker" "start" "-a" "b32f07161bef0c70f92321782bbf9cf80fa042635d67a11d45289b5d7333bc08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b32f07161bef0c70f92321782bbf9cf80fa042635d67a11d45289b5d7333bc08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b32f07161bef0c70f92321782bbf9cf80fa042635d67a11d45289b5d7333bc08", kill_on_drop: false }`
[INFO] [stdout] b32f07161bef0c70f92321782bbf9cf80fa042635d67a11d45289b5d7333bc08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13a3ed48fe0bd97a128d1caac8e3f04ff8f1a012c6284271ec9deb9eef7f7896
[INFO] running `Command { std: "docker" "start" "-a" "13a3ed48fe0bd97a128d1caac8e3f04ff8f1a012c6284271ec9deb9eef7f7896", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]     Checking futures-util v0.3.16
[INFO] [stderr]     Checking pin-project v0.4.28
[INFO] [stderr]     Checking sized-chunks v0.6.5
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking flume v0.7.2
[INFO] [stderr]  Documenting cozal v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(wake_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(map_first_last)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `cozal`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name cozal src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-a657f50f2ab78a09.so --extern flume=/opt/rustwide/target/debug/deps/libflume-4a2cd295d9ac97d5.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-fc2a485e69348f8a.rmeta --extern im=/opt/rustwide/target/debug/deps/libim-44a050311a40007d.rmeta --extern pin_project=/opt/rustwide/target/debug/deps/libpin_project-f1d4f06fec194e36.rmeta --extern take_mut=/opt/rustwide/target/debug/deps/libtake_mut-593de99758a955c8.rmeta --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "13a3ed48fe0bd97a128d1caac8e3f04ff8f1a012c6284271ec9deb9eef7f7896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13a3ed48fe0bd97a128d1caac8e3f04ff8f1a012c6284271ec9deb9eef7f7896", kill_on_drop: false }`
[INFO] [stdout] 13a3ed48fe0bd97a128d1caac8e3f04ff8f1a012c6284271ec9deb9eef7f7896
